Construction of NiAl-LDH/Mn0.5Cd0.5S heterostructure for enhancing photocatalytic H2 evolution

Abstract

Plumbing and devising photocatalysts for high photocatalytic hydrogen production is still a major challenge. In this study, the NiAl-LDH/Mn_0.5Cd_0.5S heterostructure composites are prepared by hydrothermal method. When the loading weight of NiAl-LDH is 20 wt%, NiAl-LDH/Mn_0.5Cd_0.5S composites has the excellent ability to separate photogenerated charge carriers under visible light. Meantime, the NiAl-LDH/Mn_0.5Cd_0.5S composites possess prominent photocatalytic hydrogen production rates of 55.9 mmol·h⁻¹·g⁻¹, which is 7.5 times of pure Mn_0.5Cd_0.5S and 25 times of NiAl-LDH. According to the data, the photocatalytic mechanism of electron-holes movement over NiAl-LDH/Mn_0.5Cd_0.5S composites is unlocked. This work offers a reference for designing novel heterojunction for photocatalytic production of H₂.